 /*******************************************************************************
  * Copyright (c) 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.commands.operations;

 /**
  * <p>
  * This interface is used to listen to notifications from an IOperationHistory.
  * The supplied OperationHistoryEvent describes the particular notification.
  * </p>
  * <p>
  * Operation history listeners must be prepared to receive notifications from a
  * background thread. Any UI access occurring inside the implementation must be
  * properly synchronized using the techniques specified by the client's widget
  * library.
  * </p>
  *
  * @since 3.1
  */
 public interface IOperationHistoryListener {
     /**
      * Something of note has happened in the IOperationHistory. Listeners should
      * check the supplied event for details.
      *
      * @param event
      * the OperationHistoryEvent that describes the particular
      * notification.
      */
     void historyNotification(OperationHistoryEvent event);

 }

